 .layer1{width:100%; height:100px;padding:12px;background:#00e3e3;color:pink;text-align:center;}
           .layer2-1{width:30%; height:auto;padding:32px;color:blue；background-color:#79ff79;text-align:center;float:left;}
           .layer2-2{width:60%; height:auto;margin:0 auto;color:red;background-color:#ffff6f;text-align:left;float:left;}
           .layer3{width:100%; height:30px; background:#ca8ec2;color:green;text-align:center;clear:both;}  
           h3{text-align:center;}	
   
   .layer2-1 p{font-weight:bold;color:blue;background-color:#79ff79}
   .layer2-2 p{text-indent:2em;}
   #source {text-align:right;}